#!/bin/bash
## script to fetch and build a module of youtube-dl
## by ncmprhnsbl @ forum.porteus.org
## version 20201126

. /usr/share/porteus/porteus-functions
get_colors

# Check for root
if [ $(whoami) != "root" ]; then
	echo "Only root can run this."
	exit 1
fi

# functions set work directory(default is /tmp) to current work directory
set_tmp() {
WRKDIR=/tmp 
}

set_pwd() {
WRKDIR=$(pwd) 
}
set_tmp
# set up fakeroot and set some variables
PKG=youtube-dl
[ ! -d $WRKDIR/$PKG/usr/bin ] && mkdir -p $WRKDIR/$PKG/usr/bin
#[ ! -d $WRKDIR/$PKG/install ] && mkdir -p $WRKDIR/$PKG/install
BUILD=$WRKDIR/$PKG
BIND=$WRKDIR/$PKG/usr/bin

# echo usage
show_help() {
	echo " options:  -d : do operations in the present directory, instead of /tmp . "
	echo "           -h        : show this usage. "
}
while getopts ":-d:-h:" o; do
case "$1" in
 
    -d)
       set_pwd;;
    
    -h)
      show_help
      exit 0;;
              
     *)
      show_help
      exit 1;;
    
esac
done
case "$1" in
      
    "")
      set_tmp;;
      
esac

checksum () {
if [ -z $CHOICE ]; then	
    printf "Verifying download integrity.."
    printf "Server  : $SUM1"
    printf "Download: $SUM2"
    if [ "$SUM1" = "$SUM2" ]; then 
         echo "Download verified." 
    else 
         echo "Integrity check failed."
         cleanup 
    fi
fi
}

# tidy up after
cleanup(){
echo
[ -d $BUILD ] && rm -rf $BUILD
exit	
}
trap cleanup SIGHUP SIGINT SIGTERM

# tell us where the work will be done
echo "Work will be done in: $txtgreen$WRKDIR$rst "

case `uname -m` in
	x86_64)
	ARCH=x86_64
	SUFFIX=64
	SARCH=x86_64
	;;
	*)
	ARCH=i686
	SUFFIX=
	SARCH=i586
	;;
esac

#get version info
SERVER=`awk -F= '/SERVER=/{print$NF}' /etc/porteus.conf`
VURL=http://ytdl-org.github.io/$PKG/download.html
VER=$(lynx --dump --nonumbers $VURL | grep "(sig)" | awk -F" " '{print $1}')
# download URL
URL=https://yt-dl.org/downloads/$VER/$PKG
TAG=ncm
REV=1

# check for installed version
if [ $(which $PKG 2>/dev/null) ]; then
	IVER=$($PKG --version)
	echo "you have version $IVER installed"
else
	echo "$PKG is not installed"
fi

# check installed version is up to date, if so offer escape.
if [ "$VER" = "$IVER" ]; then
	read -p " You already have the latest version $txtgreen$CVER$rst. Do you still want to continue? [y/n]" -n 1 -r -s && echo
	[[ $REPLY =~ ^[Nn]$ ]] && exit 0
fi

# Get version on porteus server
SERVER_LATFILE=`lynx -dump --nonumbers --listonly $SERVER/$SARCH/current/modules | awk -F/ '/youtube/{print$NF}' | tail -n1`
SERVER_LATVER=`awk -F- '{print$3}' <<<"${SERVER_LATFILE}"`
echo "Checking $SERVER/$SARCH/current/modules"

# show all version information
echo "The Porteus$txtgreen SERVER$rst version is :" $txtgreen "$SERVER_LATVER" $rst
echo
echo "The latest $PKG version is    :" $txtgreen "$VER" $rst
echo
cyan "You can choose to download the premade module from our server," 
cyan "or download the version from github."  
echo

read -p " Would you like to download the porteus server version? [y/n]" -n 1 -r -s && echo  
if [[ $REPLY =~ ^[Yy]$ ]]; then
	echo
	download $SERVER/$SARCH/current/modules/$SERVER_LATFILE $WRKDIR
        ## Check that we have a module in $WRKDIR
        if [ ! -f $WRKDIR/$SERVER_LATFILE ]; then
	     	echo
	     	sayerror "Download of the $PKG module failed."
	     	echo
	     	cleanup
        else
	    	echo
	    	echo "Your file is at:" $txtcyan "$WRKDIR/$SERVER_LATFILE" $rst
	    	echo "Please move it to your modules folder to survive a reboot."
	    	echo
	    	cleanup
		fi
fi

read -p " Would you like to download $txtgreen $PKG-$VER $rst ? [y/n]"  -n 1 -r -s && echo  
if [[ ! $REPLY =~ ^[Yy]$ ]]; then 
cleanup
fi

# download the latest version
download $URL $BIND

## Check that we have a binary in BIND
if [ ! -f $BIND/$PKG ]; then
	echo
	sayerror "File $BIND/$PKG not found. Some went wrong with the download."
	cleanup
fi

## Check integrity of downloaded tarball using sha256sum
SUM1=$(lynx --dump --nonumbers $VURL | grep -A 1 "SHA256:" | tail -n1 | awk -F" " '{print$NF}')
SUM2=$(sha256sum $BIND/$PKG | cut -d" " -f1)
checksum

# make executable
chmod +x $BIND/$PKG

cd $BUILD
### fake slackware type package info: super dumb version
PKGINFO=var/lib/pkgtools/packages
#FILES=`find *`
mkdir -p $PKGINFO
echo "PACKAGE NAME: $PKG-$VER-noarch-$REV$TAG" > $PKGINFO/$PKG-$VER-noarch-$REV$TAG

# add slack-desc
cat >> $PKGINFO/$PKG-$VER-noarch-$REV$TAG << EOM
PACKAGE DESCRIPTION:
youtube-dl: youtube-dl (YouTube video download utility)
youtube-dl:
youtube-dl: youtube-dl is a small command-line program to download videos
youtube-dl: from YouTube.com.  It's licensed under the MIT License.
youtube-dl:
youtube-dl: Homepage: http://www.yt-dl.org/
youtube-dl:
youtube-dl:
youtube-dl:
youtube-dl:
youtube-dl:
FILE LIST:
EOM

find * | grep -v var >> $PKGINFO/$PKG-$VER-noarch-$REV$TAG

# make slackware pkg
#cd $BUILD && makepkg -l n -c n $WRKDIR/$PKG-$VER-noarch-$REV$TAG.txz

# make module
#cd $WRKDIR && txz2xzm $PKG-$VER-noarch-$REV$TAG.txz 
cd $WRKDIR && dir2xzm $PKG $PKG-$VER-noarch-$REV$TAG.xzm
 
echo "Your module $txtgreen $PKG-$VER-noarch-$REV$TAG.xzm $rst is ready in $WRKDIR "
cyan "Please copy it to your modules folder or somewhere safe." 

cleanup